RE: PDF, spot colors,RIPs, and ink jet printers
RE: PDF, spot colors,RIPs, and ink jet printers
- Subject: RE: PDF, spot colors,RIPs, and ink jet printers
- From: Roger Breton <email@hidden>
- Date: Fri, 24 Aug 2012 09:53:02 -0400
It is true that transparency, gradients aka smooth shading and spot colors
are a PDF workflow's Achile heel.
Short of having a permanent solution, the best bet is to avoid freely mixing
those elements on a page.
Even if a smart preflight program was to catch these elements in a PDF, it
would probably be on the 11th hour and there would be very little time left
for making design changes.
The business of handling PDFs with these elements is not a problem in itself
IMO. The problem begins when reseparating images and graphics for the
purpose of matching a press condition or to save ink. There, anything can
happen and will happen.
Everybody likes PDF and it is here to stay. In most instances, it works.
Like 99.8% of the time, which isn't bad in itself. The rest of the time,
issues have to be caught before making plates. At the quantity of pages that
go through a typical workflow, no one can give 100% assurance that
everything will go through smoothly, all the time. But everybody strives for
100%.
Best / Roger Breton
-----Original Message-----
From: colorsync-users-bounces+graxx=email@hidden
[mailto:colorsync-users-bounces+graxx=email@hidden] On
Behalf Of Marc Sitkin
Sent: August-24-12 9:34 AM
To: email@hidden
Subject: Re: PDF, spot colors,RIPs, and ink jet printers
We've had terrible results printing any pdf via a RIP if transparency and
spot color was involved. The explanation from out RIP vendor was that the
problem was a result of the conversion process differing from Adobe's color
engine. We've had to RIP files to tiff in photoshop first as a workaround.
On 8/24/2012 9:27 AM, Steve Miller wrote:
> I've been doing some research with PDF files and RIPs. We want to have
> a PDF only workflow and one RIP vender is saying we should not use PDF
> files. Instead, they recommend .eps, .tif or .jpg.
> Here's a reply from one RIP vender.
>
> "The pdf print engine is implemented as a base feature in the" (enter
> any vender name here) " RIP programs. It has advanced handling of pdf
> and pdfx file formats. It was necessary for" (enter any vender name
> here) "to add this feature due to Adobe's constant alteration of the
> pdf encoding process and handling of transparencies, spot color
> handling in gradients, and compression methods. There is a basic flaw
> in the conversion of spot color in the pdf format to the rastered ink dots
of an inkjet printer.
> This is a problem that all RIPs have.. It is a problem inherent in the
> pdf format being rendered into the inkjet dot format. The repeat
> printability of colors suffers in this format. While Adobe also alters
> the EPS format, color consistency from print to print is stable."
>
> Is this a true statement?
>
Regards,
--
Marc Sitkin
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digitalmomentum,llc
1700 NW 15th Ave
Suite 360
Pompano Beach, FL 33069
954-973-2670 phone
888-880-5851
web site:
www.digitalmomentum.com
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